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Humans can live only on land, but a frog can live both on land as well as in water. Substantiate the reason behind the same.

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Final answer:

Frogs are amphibians capable of living in both water and on land due to adaptations like a dual respiratory system, protective skin, specialized hind legs for jumping, and sensitive hearing with a tympanum. Their skin aids in camouflage and defense, while land provides abundant sunlight and carbon dioxide.

Step-by-step explanation:

Humans are exclusively terrestrial and cannot live underwater without specialized equipment due to their physiological makeup. Unlike humans, frogs are amphibians, a group of vertebrates that can live both on land and in water. Amphibians have evolved to have a dual life cycle, with their larvae (like tadpoles) starting life in water breathing with gills, and adult forms adapting to breathe air with lungs and through their skin when on land.

Frogs have developed several adaptations for their dual lifestyles. They have protective skin and eyelids that aid their transition to land. Moreover, their long hind legs are specialized for efficient movement on land, specifically by jumping. The presence of a tympanum helps them hear both in water and on land.

Their skin, which is smooth and moist compared to toads, enables them to live in aquatic environments, while also offering camouflage and sometimes toxic chemicals to deter predators on land. Furthermore, the availability of abundant sunlight and carbon dioxide on land benefits the frogs' predatory and respiratory needs.

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